Re-dispersion of gold supported on a <b>‘</b>mixed<b>’</b> oxide support

Morgan, Kevin T.; Burch, Robbie; Daous, Muhammad A.; Delgado, Juan J.; Goguet, Alexandre; Hardacre, Christopher; Petrov, L.; Rooney, David

doi:10.1179/2055075815y.0000000005

Cited by 5 publications

(8 citation statements)

References 32 publications

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“…The vapor phase iodomethane treatment has been studied for its potential to recover activity in a previously sintered catalyst, namely, Au supported on a ceria−zirconia−titania mixed oxide. 194 The iodomethane treatment produced an active catalyst (50% conversion at 175 °C) with a higher performance than the sintered catalyst (50% conversion at 375 °C). DRUV characterization of the sintered and treated catalysts indicated that the latter had some gold particles that are smaller in size than those found in the sintered sample.…”

Section: Metal Redispersion Strategiesmentioning

confidence: 99%

“…The vapor phase iodomethane treatment has been studied for its potential to recover activity in a previously sintered catalyst, namely, Au supported on a ceria–zirconia–titania mixed oxide . The iodomethane treatment produced an active catalyst (50% conversion at 175 °C) with a higher performance than the sintered catalyst (50% conversion at 375 °C).…”

Section: Metal Redispersion Strategiesmentioning

confidence: 99%

See 1 more Smart Citation

Metal Redispersion Strategies for Recycling of Supported Metal Catalysts: A Perspective

Morgan¹,

Goguet²,

Hardacre³

2015

ACS Catal.

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177

152

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Catalyst deactivation is ultimately inevitable, and one of the processes known to cause deactivation is sintering of metal particles. Consequently, numerous methods to reverse the sintering process by re-dispersing metal nanoparticles have been developed. These methods are discussed in this perspective, and the reported mechanisms of re-dispersion are summarized. Additionally, the longer term practical use of such treatments, and the benefits this can bring, is briefly disclosed.

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Section: Metal Redispersion Strategiesmentioning

confidence: 99%

Section: Metal Redispersion Strategiesmentioning

confidence: 99%

Metal Redispersion Strategies for Recycling of Supported Metal Catalysts: A Perspective

Morgan¹,

Goguet²,

Hardacre³

2015

ACS Catal.

Self Cite

177

152

View full text Add to dashboard Cite

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“…These results indicate that both copper and iron are working independently on different mechanistic pathways playing very different, but still very important roles during the oxidation process, as was indicated previously. 22,[48][49][50] It is clear that an equimolar catalyst concentration is best but that the reaction is more sensitive to a decrease in Cu 2+ content than Fe 3+ content.…”

Section: Mixed Cuso 4 and Fe 2 O 3 Catalyst For Wao Of Ligninmentioning

confidence: 99%

Life cycle thinking case study for catalytic wet air oxidation of lignin in bamboo biomass for vanillin production

et al. 2021

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“…Promisingly, for noble metal supported on reducible metal oxides or encapsulated within supports, reversing the sintering process (redispersion) were reported recently [24,25]. Namely, two contradictory process of metal dispersion or agglomeration may exist simultaneously [23], and generally believe that redispersion of metal is related to high calcination temperature and different atmosphere [26,27].…”

Section: Introductionmentioning

confidence: 99%

Redispersion of Pt nanoparticles encapsulated within ZSM-5 at high temperature oxygen for partial oxidation of methane

Wang

Ding

et al. 2022

Preprint

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Active metal agglomeration in heterogeneous catalysis is a crucial reason of catalyst deactivation. Consequently, many methods to inhibit the sintering by redispersing metal course have been widely studied. However, the redispersion conditions of catalysts with different structures may also be different. In our work, we prepared Pt/ZSM-5 and Pt@ZSM-5 catalysts to study that the redispersion of Pt under different pretreatment conditions. Characterizations demonstrate that only Pt@ZSM-5 (4R, 5O) implements Pt redispersion. The redispersion of Pt nanoparticles is due to the encapsulation constraint of the ZSM-5 as well as Ptδ+ species migrate at 500℃ oxygen atmosphere, which are anchored to the -(-O-Si≡)y site in ZSM-5 by strong metal support interaction. Benefiting from highly dispersed active sites, Pt@ZSM-5 (4R, 5O) catalyst also shows excellently catalytic activity, stability and anti-carbon deposition ability in partial oxidation of methane (POM). The results provide ideas for the preparation of catalysts for high temperature oxidation reaction.

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Re-dispersion of gold supported on a ‘mixed’ oxide support

Cited by 5 publications

References 32 publications

Metal Redispersion Strategies for Recycling of Supported Metal Catalysts: A Perspective

Metal Redispersion Strategies for Recycling of Supported Metal Catalysts: A Perspective

Life cycle thinking case study for catalytic wet air oxidation of lignin in bamboo biomass for vanillin production

Redispersion of Pt nanoparticles encapsulated within ZSM-5 at high temperature oxygen for partial oxidation of methane

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